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A few days after JEE Main or NEET-UG, the National Testing Agency (NTA) publishes a provisional answer key. For a short window you can compare it with your own responses and challenge any answer you think is wrong. Done well, this takes an evening. Done badly, it costs money and achieves nothing. This post sets out what the official documents say, how a key change affects your score, and how to file a challenge that experts can act on.
What is a provisional answer key?
It is NTA's first version of the correct answers. The JEE (Main) 2026 Information Bulletin (section 5.6) says NTA displays the provisional key along with each candidate's recorded responses, with a public notice, and that the key is "likely to be displayed for two to three days". Subject experts then examine all challenges and a final key is declared. The result is compiled from the final key, and no grievance about the key is entertained after results.
The NEET (UG) 2026 Information Bulletin (Chapter 15) works the same way: challenges are verified "with the help of a panel of subject experts", and if a challenge is correct the key is revised "and applied in the response of all the candidates". Neither exam has re-checking or re-evaluation of answer sheets, so the challenge window is your one chance to question the key.
What does it cost, and is the fee refunded?
Both bulletins set a processing fee of Rs 200 per question challenged and describe it as non-refundable. The rules can change between notices, though. The NTA public notice of 25 June 2026 for the NEET (UG) 2026 re-examination said the Rs 200 would be "refunded in full for every challenge that is accepted", and gave a window of 25 to 28 June 2026. Always read the public notice for your own exam, not last year's rules or a coaching summary.
How does a changed key affect your score?
Both exams mark +4 for a correct answer, -1 for a wrong one and 0 for unanswered. Here is a worked example with sample numbers.
Say you attempted 150 questions in NEET and, by the provisional key, got 130 right and 20 wrong. Your provisional score is 130 × 4 - 20 × 1 = 520 - 20 = 500.
Key changed to your option on one question: that question moves from -1 to +4, a gain of 5. New score: 505.
Question dropped: the NEET bulletin says all candidates who appeared get +4, whether or not they attempted it. If you had it wrong, you gain 5. If you had it right, nothing changes. If you skipped it, you gain 4.
More than one option found correct: +4 goes only to those who marked any of the correct options.
JEE Main is slightly different. If an MCQ or numerical question is dropped, the bulletin awards full marks to all candidates in that shift. Remember that JEE Main converts raw marks to NTA scores, and since a correction helps everyone who marked that option, your rank moves less than your raw marks suggest. Our post on negative marking and when to guess explains the +4/-1 arithmetic in more detail.
How do you build a challenge that experts accept?
The JEE Main bulletin states that "challenges without justification/evidence" will not be considered. The June 2026 NEET notice is more specific: upload "references from standard textbooks (with chapter and page citation), NCERT, and other reputable academic publications", and "only authentic and verifiable sources will be considered".
Before you pay anything:
Recompute your answer from scratch, without looking at the key. Many apparent key errors turn out to be your own slip.
Find the exact source. For a NEET biology fact, find the NCERT line. For a physics or chemistry numerical, write a full solution that shows each step and the constants given in the question.
Check your series or shift. The NEET notice asks you to challenge only under your own Question Paper Series Code; question numbers differ between sets.
Write a one-paragraph remark that states the claim plainly: "Option 3 is correct because..." followed by the citation.
What are the steps on the portal?
The annexure to the June 2026 NEET notice lists them in order: enter your series code, select the questions, add remarks and upload evidence, review, pay, confirm, and save the acknowledgement. Two warnings from that notice: submission "can be made only once", and challenges by email, fax or letter, or without the fee, are not accepted. Pay before the deadline in the notice, since late payments do not count.
What about your recorded responses?
JEE Main shows the question paper you attempted and your recorded responses before results; the bulletin advises downloading and keeping a copy because "the same will not be provided at a later stage". NEET displays scanned OMR sheets, and the bulletin allows a separate representation against OMR grading, also at Rs 200 per question. If a recorded response does not match what you marked, that is a different issue from a key error, so use the matching link.
JEE Advanced is run by the IITs, not NTA. Its 2026 brochure says candidates "may submit their feedback" on provisional keys through the candidate portal, during a set window. Read that brochure for its rules.
Mistakes to avoid
Challenging because "everyone on social media says so". Experts look at evidence, not volume.
Citing a coaching answer key as proof. Use NCERT or a standard textbook.
Filing under the wrong series code or shift.
Waiting until the last hour, when payment pages are slow.
Expecting an email reply. Neither bulletin promises individual replies; read the final key.
If a disputed physics or chemistry numerical is the issue, the Fermi Problem Library has worked problems with a step-by-step solver that explains the reasoning, which helps you check your own solution before you pay to challenge.
Bookmark your exam's official site today, and when the key appears, score yourself before you read any discussion online.
